Sound shielding device

A sound insulation device comprising:

• a glass sheet composite comprising a plurality of glass plates being laminated, comprising an intermediate layer between at least a pair of glass plates among the glass plates, and partitioning an interior space and an exterior space;
• a vibration output unit being fixed to the glass sheet composite and vibrating the glass sheet composite according to an input signal;
• an exterior sound detection unit detecting a sound from a noise source or a vibration source and outputting a reference signal according to a detection result, the sound being correlated with a sound wave vibration induced in the glass sheet composite;
• an interior sound detection unit detecting a sound in the interior space and outputting an error signal according to a detection result;
• and
• a control unit comprising an adaptive filter that generates a cancel signal having a phase opposite to a phase of the reference signal to minimize the error signal, and outputting the cancel signal from the adaptive filter to the vibration output unit.